Turf Mark Blue spray indicator is a natural-looking, temporary colorant that shows exactly where application has occurred. The highly visible color helps prevent skips, overlaps, and helps point and minimize drift, leaving turf looking lush and healthy after treatment. Turf Mark Blue is safe, non-toxic, and won't harm people, animals, or the environment. Turf Mark Blue can assist anyone applying structural pesticides by marking treated areas blue. Turf Mark Blue will indicate treatments on soil, wood, fibrous material and other areas. The colorant will help to eliminate damaging or wasteful overlap and reduce problem skips in application. Turf Mark Blue washes off most surfaces with soap and water. This product may stain certain surfaces in pretreatment applications.